Priming attachment for spark-plugs.



W. c. REYNoLDs.

PRIMING ATTACHMENT PoR SPAR PLUGS."

\ APPLlIOATIOH FILED DEO. 17, 1808, 966,767,

Pantea Aug. 9, 1916.

i Fig.2.

, jf, Fig. s.

UNITED STATES PATENT OFFICE.

WILLIAM c. REYNOLDS, OFAALPENA, MICHIGAN.

PRIMING ATTACHMENT FOR SPARK-PLUGS.

To all whom 'it may concern: v

Be it known that I, WILLIAM C. REY- NOLDS, a citizen of the UnitedStates, residing at Alpena, in the county of Alpena, State of Michigan,have invented certain new and useful Improvements in Priming Attachmentsfor Spark-Flu s; and I do declare the following to be a ull, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same, referencebeing had to the accompanying drawings, andI to the figures of referencemarked thereon, which form a part of this specification.

This invention relates to a priming attachment for 'spark plugs of thetype commonly employed in internal combustion engines, and consists inthe construction and arrangement of parts hereinafter more fully -setforth and pointed out particularly inthe claim.v v

The primary object of the invention is to provide simple and efficientmeans for intro.- ducing a prlming charge into the explosion chamber orcylinder of an engine, the arrangement being such as to automaticallyprevent the escape through the priming device of any of the' gases underpressure created by the explosion within the cylinder.

A further object is to so connect the priming attachment with the sleeveof 'the spark plug as to afford a direct passage for the gasolene orother explosive fluid, obviating the liability of the passage becomingchoked or clogged.

A further object is to so form said passage as to enable it to bereadily cleaned.

The above objects are attained by 'the structure illustrated in theaccompanying drawings, in which n Figure 1 is an elevation of aspark-plug having my im roved priming attachment, showing said p ugscrewed into the wall of the cylinder or combustion chamber of anengine. Fig. 2 is a similar view showing the sleeve of the plug and thepriming attachmentin section. Fig. 3 is an enlarged view in section,showing the sleeve and priming attachment with the ball check valveremoved from the priming cup, and a portion of the sleeve'broken away.

Referring to the characters of reference,

1 designates a"`section of the wall of a cylin`- der or combustionchamber which is bored and tapped for the reception of the screw- 'a cup9 which is internallgy threade Specication of Letters Patent. PatentedAug. 9, 1910. o Application ined December 17, 190s. seria1No.'4c7,955.

threaded sleeve 2 of the spark plug, the outer end of said sleeve beingformed for the application of a wrench, as shown at 3. Within thesleeve`2 is the ordinary porcelain core 4 commonly employed in sparkplugs through which passes one of the electrodes 5, the wall of thesleeve 2 serving as the other electrode, as will be well understood.` Toconfine the porcelain core within the sleeve of the plug, a gland 6 is'employed which screws onto the up r threaded end 7 of said sleeve, al1of whiche in the art.

Projecting fromthe up er end of the sleeve and preferably formedintegral therewith is a bracket 8 carryin at its up er end at its upperend, as shown at 10. Formed through the bracket `8 and connecting thebottom of the c p19 with the interior of the sleeve is a straig tpassage 1l for the flow of gasolene, or other explosive Huid. Theposition of the assa 11 is such as to enable it to be rille through thecup 9, thereb obviating the necessity of coring. and a ording a passagewithout an an le or bend therein, thereby reducing the lia ility ofclogging to the minimum. Should the passage 11 become clogged in anrmanner,

'or from any cause, it may be readl y cleaned by passing a smallinstrument through said passage from the bottom of the cup 9.

- To provide for closing the upper end of the cup 9 a valve case 12 isemp oyed which is internally threaded, as at 13, to screw into the topof said cup. The top of the valve case is conical and is rovided with acentral opening which is dlosed by a ball valve 14 seated therein andheld upon its seat b a coiled spring 15 which supports said bal Thelower end of the-spring 15 rests upon .the bottom 16 ofthe casethroughwhic a central aperture 17 for the passage of the combustible Huid intothe cup 9. The case 12 is provided with a flange 18 `formed to enable awrench to be1 applied thereto for the purpose of screwing said case intothe cu By pressing downwardly upon the ball 14 with the spout of a can,said ball will be unseated sufficiently to enable the introduction ofsaid spout into the case 12 and the disconstruction is common o chargethereinto of a priming charge of I combustible fluid. Upon thewithdrawal of `said spout, the spring "15 will return the valve to itsseat owing to the 'concaved under face of said cup. From the valve case12 the fluid lows intdthe cu'p and thence through the passage 11 intothe cylinder or combustion chamber of the engine through the space 19between the core and theinner wall of the sleeve. The gases created bythel explosion of a charge in the cylinder of the engine cannot escapethrough the passage 11 and the cup, owing to the fact that anypressurewithin said passage or cup only serves to force the ball morefirmly onto its seat.

By the use of this device a very simple and eiicient means is providedfor introdue` ing a priming charge into the cylinder of an enginewithout removing the spark plug or detaehing any part connectedtherewith.

Havin thus fully set forth Amy invention, what I c aim as new anddesirelto secure by Letters Patent, is

A spark plug sleeve-having a projecting resting on the bottom of saidcap and en-4 gaging said ball.

In testimony whereof, I sign this specification in the presence of twowitnesses.

WILLIAM C. REYNOLDS. Witnesses:

I. G. HowLETr, O. B. BAENZIGER.

